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Power Systems

Power Systems
Proximity effect is more in case of

None of these
 same in both cases
 over head lines
 power cables

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Power Systems
What type of back up protection is used for alternators?

  Impedance relay.
  Mho relay.
  Buchholz relay.
  IDMT relay.

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Power Systems
A transmission line has impedance of (0.005 + j0.05) pu. Find the line at which maximum value of negative DC off set current is produced, if it is applied with Vm cosωt?

 4.68 msec
 1.47 msec
 9.68
 2.63 msec

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Power Systems
Pumped storage plant is a

 peak load plant
None of these
 both 1 and 2
 base load plant

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Power Systems
Range of accelerating factor is

 50 to 100
 10.8 to 11.2
 1 to 10
 1.6 to 1.8

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Power Systems
Surge impedance loading of a line is increased by which of the following compensation methods?

 both 1 and 2
 shunt capacitor
 series capacitor
 shunt reactor

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